Spectroscopic and Magnetic Properties of Octylsulfonyl-Metallophthalocyanines Depending on Various Kinds of Central Metal Ions

초록

We demonstrate spectroscopic and magnetic properties of octylsulfonyl phthalocyanines including Ni, Cu, Co and Zn central metal ions. The free base octylthio Pc have the Q band split due to D-2h symmetry. The Q band of the octylsulfonyl Pc was blue-shifted compared to octylthio Pc due to the electron-withdrawing substituents, lowering the HOMO energy level which leads to an increase of the HOMO-LUMO band gap energy. The B (Soret) and Q band of NiPc shows more blue-shifted than the other MPcs due to stronger electronegativity (E-N/r(i)) of the nickel central metal ion. The strong fluorescence peak of ZnPc was observed due to fully occupied d-orbital electronic configuration of Zn2+(d(10)). CuPc[II] and CoPc[III], show broad EPR signals, Delta H-pp = 146 G and 277 G, respectively due to the intermolecular spin-spin interactions.

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